David Cameron has appealed for a calm response to the inquest verdict that Mark
Duggan was lawfully killed by a police marksman despite being unarmed.

The Prime Minister said he hoped people would respect the "proper judicial process" and welcomed the stance taken by Mr Duggan's aunt Carole, who said she wanted "no more violence".

Mr Cameron spoke as Mr Duggan's family confirmed plans for a vigil to be held outside Tottenham Police Station on Saturday at 2pm.

Pastor Nims Obunge - who presided over Mark Duggan's funeral - said the family want the event to be about "peace and respect".

Earlier one of the Metropolitan Police's most senior officers told Sky News the force could have shown "better transparency" in its response to the shooting.

Assistant Commissioner Mark Rowley was responding to allegations that officers may have colluded when they put together their notes of the incident.

He told Sky's Crime Correspondent Martin Brunt: "We've already made some changes and I think there's more we can do.

Image Caption:An aerial shot shows the taxi in which Mr Duggan was travelling

"Every officer has to give their own account of what they recollect, so while they're witnesses, they're sitting down, they're making statements and they put hundreds of pages of evidence into the IPCC - it has to be their own accounts.

"Clearly, the way that was done, there's ways we could have better transparency, more clear supervision and we've put some changes in place."

Video:Duggan Pastor: 'Tottenham Is Calm'

Mr Duggan, whose death sparked protests that led to riots and looting across the country, was shot and killed when police stopped the taxi in which he was travelling in Tottenham, north London, in August 2011.

Following a four-month inquest, on Wednesday the jury found that although the 29-year-old had a gun in the cab, he probably threw it onto a nearby grass verge as soon as the car came to a stop.

Assistant Commissioner Rowley, who was heckled outside the Royal Courts of Justice by Mark Duggan supporters, said he had not had any response to an offer to meet Mr Duggan's family.

He told Sky: "They're angry at the verdicts, I can understand they might not want to meet me. I'd rather express our sympathy and have a conversation in private."

Tottenham MP David Lammy was among community leaders who met with Met Commissioner Sir Bernard Hogan-Howe at Scotland Yard on Thursday.

He told Sky News there was "dismay and anger" in Tottenham at the inquest verdicts, but that people were also "looking forward" and are planning a peaceful vigil for the weekend.

Firearms officers will trial the use of body-worn video cameras to improve public confidence in the wake of the Mr Duggan's killing, it has emerged.

Video:Duggan Vigil Will Be 'Peaceful'

Senior officers want to use the camera technology from April, to avoid the dispute and uncertainty which has dogged the Duggan investigation.

Assistant Commissioner Rowley said earlier: "There are great benefits to having these incidents on video. Look at the Lee Rigby case - everyone knows what happened.

"We don't need all these different opinions and conjecture - it's much easier to get to the facts."

The cameras are already used by some US police forces.

During his weekly LBC phone-in, Deputy Prime Minister Nick Clegg said there were "questions that need to be asked" about the handling of complaints about the police.

He said: "I was struck when I went there (Tottenham) that locals said about how when the IPCC gets involved the details aren't allowed to be publicised at the time when people need to talk to each other."

Wednesday's verdict sparked angry scenes outside the Royal Courts of Justice, which Mr Duggan's family called "perverse", claiming he had been "executed" by the police.

Video:Mark Duggan's Family 'Shocked'

Mr Duggan's aunt Carole Duggan said: "The majority of the people in this country know that Mark was executed. We are going to fight until we have no breath left in our body for Mark and his children."

Their solicitor Marcia Willis-Stewart said: "On August 4, 2011 an unarmed man was shot down in Tottenham. Today we have had what we can only call a perverse judgement.

"The jury found that he had no gun in his hand and yet he was gunned down. For us that's an unlawful killing."

Metropolitan Police Commissioner Sir Bernard Hogan-Howe said the shooting had led to a "significant reduction in trust" between the capital's black communities and the police.

He said: "I know that we have much work to do with black Londoners to build trust and confidence in the Metropolitan Police.

"My officers do not set out to run an operation that results in someone dying. They are brave people who risk their own lives to keep the public safe."

The Independent Police Complaints Commission said it was looking at new evidence that had emerged from the inquest, and the Duggan family are now considering whether to try to get the inquest conclusion judicially reviewed.

Mr Duggan was being followed by officers who believed he planned to pick up a gun from another man, Kevin Hutchinson-Foster, and then move on to Broadwater Farm, also in Tottenham.

Hutchinson-Foster has since been found guilty of supplying a gun to Mr Duggan.